Negative current for N6762A

Hi everybody, We have a N6762A in our lab and we want to test some solar cells under illumination and we would like to know, as this module just work in the first quadrant, if we will be abble to mesure negative currents. As you may know, under illumination for positive voltages we get negative and then positives currents proportional to the power of illumination with allow us to mesure Voc and Isc. Thanks for your answer.